package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.BaseException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
@Slf4j
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 根据Id查询员工
     * @param id
     * @return
     */
    @Override
    public Employee findEmpById(Long id) {
        Employee employee = employeeMapper.findEmpById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    @Override
    public void updateEmpById(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updateEmpById(employee);
    }

    /**
     * 启动禁用员工
     * @param status
     * @param id
     */
    @Override
    public void statusStarStopById(Integer status, Long id) {
        Employee employee = Employee.builder().id(id).status(status).build();
        employeeMapper.update(employee);
    }

    /**
     * 分页查询
     * @param pageQueryDTO
     * @return
     */
    @Override
    public PageResult findByPage(EmployeePageQueryDTO pageQueryDTO) {
        PageHelper.startPage(pageQueryDTO.getPage(),pageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.findByPageAndName(pageQueryDTO);
        long total = page.getTotal();
        List<Employee> result = page.getResult();
        return new PageResult(total, result);
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void saveEmployee(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

//        //当前记录的创建和修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
//        //前记录创建人id和修改人id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        // 如果使用了AOP，让AOP的切面帮助我们给实体类的这4个字段赋值
        // 实体类传递给Mapper对象的方法，结论AOP的切入点mapper
        // 思路：使用AOP，创建一个切面，切面的切入点拦截是Service的方法还是Mapper的方法
        // 我们目的是就是在写数据库之前，不用自己给功能字段填充数据
        employeeMapper.insertEmployee(employee);
    }

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        //
        String md5Password = DigestUtils.md5DigestAsHex(password.getBytes());
        log.info("d5Password:{}",md5Password);
        if (!md5Password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

}
